Fix go build commands

To make the build works, I had to join the 2 following lines in the same command :

```
CGO_ENABLED=0 GOOS=linux GOARCH=arm ./make.bash  
CC="$NDK_ROOT/bin/arm-linux-androideabi-gcc" GOOS=linux GOARCH=arm GOARM=7 CGO_ENABLED=1 
```

It's probably obvious for people who are comfortables with go builds, but not for me (and maybe others).